75. Explain the OSI Model and its Various Layers?
The Open Systems Interconnection (OSI) model is a reference model for how applications interact over a computer network. It is made up of seven layers, as indicated below:Physical Layer: This is the lowest level in the OSI model. Data is turned into an electrical impulse and transmitted via physical media in this case. It's also in charge of the actual link between the devices.Data Link Layer: The data packet is encoded and decoded into bits at this layer. This layer investigates message transport from node to node.Network Layer: Datagrams are transported from one layer to the next at this layer. Routing and logical addressing are the functions here.Transport Layer: This layer is in charge of establishing end-to-end connections. Segments are the data in this layer. TCP and UDP protocols are used here.Session Layer: Signals between computers are controlled by the session Layer. This layer is responsible for establishing, maintaining, and
